MOC8105 Ultra High CTR Optocoupler DIP – Phototransistor Output Isolation IC

Description

MOC8105 Ultra High CTR Optocoupler DIP – Phototransistor Output Isolation IC

The MOC8105 optocoupler is an ultra-high current transfer ratio (CTR) opto-isolator designed for applications requiring strong output drive with minimal input current. It integrates an infrared LED and a phototransistor output in a reliable DIP package, providing excellent electrical isolation between control and power circuits. The MOC8105 is especially suitable for SMPS feedback loops, industrial controllers, PLC inputs, and precision signal isolation where higher CTR performance is required.

Applications

• SMPS feedback and regulation circuits
• Microcontroller and PLC input isolation
• Industrial automation and control systems
• Relay driving and digital signal isolation
• Noise suppression between power and logic stages

How to Use

1. Drive the internal infrared LED through a current-limiting resistor.
2. Ensure correct LED polarity to avoid device damage.
3. Use the phototransistor output on the isolated side with a pull-up resistor if required.
4. Maintain adequate PCB creepage and clearance for maximum isolation performance.
5. Test CTR behavior under actual operating conditions.